Carbureter.



1. L. DRESSLER. CARBURETER.

APPLICATION FILED mma. ma.

mime? Patented Feb. 6, 1917.

JOHN L. DRESSLER, 0F NEW YORK, N. Y.

CARBURETER.

Specication of Letters Patent.

Patented Feb. 6, 191?.

Application filed Barch 8, 1913. Serial No. 752,891.

To aZZ whom t may concern: A

Be it known that'l, JOHN L. DREssLnR, a citizen of the United States of America, re# siding in New York, in the borough of the Bronx, county and State of New York, have invented certain new and useful Improvements in Carbureters for Gasolene-Engines, of which the following is a specification.

rl`his invention relates to an improved carburter for gasolene-engines by which a regular supply of fuel in vapor form is supplied and then mixed with the required quantity of air for combustion, and by which the supply of gasolene or other fuel to the carbureter is controlled in a very effective manner, without being affected by the motions of the automobile to which the engine is applied. 1

The invention consists of a carbureter for gasolene-engines which comprises afuel-receptacle, a float in the same, a fuel supplypipe, a valve for the same operated by said ioat, a fuel suction-pipe provided with a needle-valve, an air suction-pipe by which the fuel is vaporized, a mixing-chamber, and a spring-regulated air admission-valve for supplying the required quantity of air necessary for combustion to the mixing-chamber and to the cylinders of the engine.

The invention consists further of certain details of construction .which will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of my improved carbureter, Fig. 2 is a plan view, partly in horizontal section on the line 6 6 of Fig. l, and Fig. 3 is a vertical transverse section on the line 7 7 of Fig. 2.

Similar reference characters indicate corresponding parts throughout thev several figures of the drawings.

Referring to the drawings, a represents a cylindrical receptacle for the gasolene, which is connected to the gasolene tank by a suitable supply pipe (not shown). rlhe top and bottom plates of the gasolene receptacle a are connected by a central tubular screw-post g through which atomizing air is supplied as hereinafter more fullyV pointed out, said port being held in yplaceby a screw nut at at the lower end thereof. On the gasolene receptacle a is supported a cylindrical mixing chamber b, which is connected to the manifold m1 by a horizontal supply pipe b2, the manifold extending to the cylinder of the s engine in the well known manner. The receptacle a is provided with an outlet cock o1 on lts bottom plate for drawing off the fuel when the carbureter is not required for use.

In the gasolene receptacle is located an annular ioat f which is made of a ring of cork, a hollow ring of copper or other material, and which float is connected by upright arms f1 with the ends f2 of a lever (not shown) which controls the supplying of gasolene to the receptacle in the well known manner. The gasolene in the receptacle a is kept above the level of the gasolene suction pipe CZ, which extends from the top plate of the receptacle` downwardly into the gasolene therein. The suction pipe Z is supported in a block d1, screwed into the top plate of the receptacle a, and extended downwardly to a point at some distance from the bottom of the same, as shown in Fig. l. rlhe upper end of the suction pipe Z communicates with a horizontally disposed gasolene delivery tube d6, which passes through a central bore d2 and a bore Z8 in the block all, disposed at the upper end of the pipe g, the bore ZS being spaced' from the pipe d6. The opening of the tube (Z6 is opened and closed by a needlevalve cl3 provided with a hand wheel d4 at its outer end. The gasolene delivery pipe de is surrounded by a pipe (Z7, which is provided with a gage cap so that the mixture of air vand gasolene vapors are evenly distributed to the mixing chamber b. A valve-casing c is provided on the mixing chamber I; in axial alinement with the fuel receptacle a, and which is open at its lower end and closed by an air admission-valve 01 mounted on a central stem o2 that passes vertically through the casing c, and that can be adjusted higher and lower by means of its threaded upper ortion and a screw nut o3. A helical s rino t? s is interposed between the valve c1 and a vcollar o4 on the stem o2, this tension of the sprintf beinr regulated by the adjustment of o C b l the valve-stem c2. in the connecting pipe b2 is arranged a throttle-valve it, which is placed into open or closed position by means of a. crank-arm ,71.1 applied to its center pivot h2 and a leverrod 71,3, the position of the throttle-valve when in entirely open position being obtained by a projection b4 abutting on a screw-stop b5 on the top plate of the mixing chamber b. By more or less opening the throttle valve It, the quantity of explosive fuel and air mixture drawn in by the suction of the engine according to the speed of the same. l/Vhen the suction ceases, the gasolene which has been drawn upwardly in the tube d, falls back to its former level leaving a supply of atomized gasolene in the suction pipe or walled space d, which supply will be further increased by the atomization in the pipe d so that there will be a supply of vapor before the next suction. Since the air tube g communicates with the bore cl2, this walled space is not directly in the path of the entering air current, which sweeps along the vapors by its aspirating action.

A cam z' on the spindle of the throttlevalve by its movement reciprocates a rod l mounted in a projection 7c, provided on the casing of the. chamber Z), and a projecting member csecured to a tubular portion 7a2 of the casing Z), which slidably supports the needle valve casing 56. The rod l is formed in two pieces, and is adjustable by means of a coupling memberk3 engaging the threaded and adjacent ends of the two pieces forming the rod. A forked lever 2 pivotally mounted in an extension 704 of the supporting mem- E ber 761 contacts at one end with the end of the rod (Z1, and at its forked end engages a sleeve 71:5 rigidly securedV to the needle valve casing 7), a spring o? being disposed between the sleeve and the end of the tubular support la? of the valve casing. The needle valve h5 is threaded, and by movement of the hand-wheel L at the end thereof, may be adjusted independently of the throttle valve. The periphery of the hand wheel is graduated by serrations, and an indicator s extends over the same, engages between the serrations (as clearly shown in Fig. l) so that the needle valve may be adjusted and the supply of gasolene regulated with great exactness. The connection between the cam, the throttle valve and the needle valve casing is thus positive and there is no play between the parts as distinguished from connections maintained by the use of springs and other yielding means.

The operation of my improved carbureter is as follows: The level of the fuel in the receptacle is regulated by the float, so that a. regular supply of fuel in the receptacle is kept up. By the turning of the fly wheel of the engine a suction is exerted in the carbureter, so that the gasolene is drawn through the pipe cl, and atomized by the suction of the air drawn in through the pipe g after opening the needle valve to the required degree. The mixture of air and vapor is then deliveredv into the mixing chamber, and there mixed with the additional quantity of air which is necessary to form the explosive mixture, the latter being then drawn through the manifoldm1 into the cylinder of the engine. In order to regulate the quantity of the mixture supplied to the engine cylinder, the throttle valve is operated, which through the cam z' moves the rod 1,

which in turn swings the forked lever 2"", causing the needle valve to be moved in proportion to the movement of the throttle. By turning the hand-wheel b4, beneath the indicator the valve may be very accurately adj ustedindependently of the throttle.

l have illustrated a preferred and satisfactory form of my invention, but it is obvious that changes may be made therein within the spirit and scope thereof as dehned in the appended claims.

claim:

l. In a carbureter, an outlet pipe for said carbureter, a revoluble throttle valve in said outlet pipe, a revoluble spindle-in said outlet'pipe, said throttle valve being mounted on said spindle, means on one end of said spindle for turning said throttle valve, a. camon the other end of said spindle, and adapted to be revolved therewith, a. fuel pipe for said carbureter, a valve for said fuel. pipe comprising a slidable non-rotatableinteriorly threaded valve casing, a threaded valve stem slidably engaging said threaded valve casing, and controlling the openingof said fuel pipe, a' handwheel on said valve stem, and apivoted forked lever engaging at its forked end said valve casing, a reciprocating rod disposed between the oppositejend of said lever and said cam, and having contacting engagement therewith, and a spring on said valve casing adapted to maintainv engagement of said cam, rod andforked lever, whereby the movement of said cam prop'ortionately reciprocates said valvey casing and said valve stem, said valve stem adapted to be rotatably moved independently of said casing wheel.

ln a carbureter, an outlet pipe for said carbureter, a revoluble throttle valve in said outlet pipe, a revoluble spindle in said outlet pipe, said throttle'valve being mounted on said spindle, means on one end of said spindle for turning said throttle valve, a

cam on` the other end of said spindle, and adapted to be revolved therewith, a fuel pipe for said carbureter, a valve for said fuel pipe comprising a slidable'non-rotatable interiorly threaded valve casing, athreaded valve stem rotatably engaging said threaded valve casing and controlling the opening of said fuel pipe, a hand wheel on said valve stem, provided on its peripheryY with serrations, and a pivoted forked lever engaging at its forked end said valvel casing, a reciprocating' rod disposed between` the opposite end of said lever and said cam, and having contacting engagement therewith, and a spring on said valve casing adapted to maintain engagement of said cam, rod and forked lever, whereby the movement of said'cam proportionately reciprocates said valve casing and saidvalve stem, said valvestem adapted to be rotatably moved' independby movement of said handY ies ently of said casing by movement of said In testimony, that I claim the foregoing hand Wheel, and a spring indicator on said as my invention, I have signed my name in 10 valve casing extending over said periphery presence of two subscribing Witnesses.

of said hand Wheel, and resilently engag- JOHN L. DRESSLER.

, ing between the serratons thereof to accurately determine the movement of said hand TWitnesses: Wheel, and retain the Said hand Wheel in po- PAUL GOEPEL, sition. JOHN MURTAGH.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. C." 

